*{
    margin:0;
    padding:0;
    box-sizing: border-box;
}


body{
    height:100%;
    margin: auto;
    background-image:url("../img/bg.jpg");

}
.panel-form{
    margin:200px auto;width:450px;height: 360px;

}

.btn-style{
    width:400px;
    height:35px;

}